Finite-element mathematical simulation proved that the tectonic additional hydrostatic pressure in rocks continuously reduces from compression deformation zone to shear deformation zone to extension deformation zone.

By means of finite-element mathematical modeling, it is verified that the change of the tectonic additional hydrostatic pressure beared by the rocks from compression deformation belt, shear deformation belt to extension deformation belt has a ragularity of weekening one after another.

The paper studies the tectonic additional hydrostatic pressure of ductile shear zone, which hosts Jinshan gold deposit, based on tectono-physicochemistry theory, calculating the formational depth of Jinshan gold deposit.

The result indicates that their contributions to mineralization are in decreasing order of pH, average temperature, tectono additional hydrostatic pressure, p s, p min ,CO 2/H 2O,lg f CO 2 ,lg f O 2 ,F -/Cl -,and Na/K.

The formation depth of ≥32 09～32\^11 km of the coesite\|bearing eclogite in Yingshan County in the Dabie UHPM zone is obtained from P G( P-P S) where P is the pressure where the transformation of coesite phase took place,and P S=(σ 1+σ 2+σ 3)/3. P is known to be 2\^8GPa by Qz\|coes geobarometer.

This has a considerable significance in the study of tectonic heat and mineral liquid migration in association with the research on tectonic additional hydrostatic pressure.

Linglong-Jiaojia-type gold deposits in this paper deff erent from main research types of the world mean the pyrite quartz vein-phyllic altered cataclasite type occurring in shear zone of granites of Mesozoic. The material base of alteration-remelting of the granites comes mainly from a Precambrian sedimentary-metamorphic series containing intermediate-basic volcanics. Because of different properties of ore-containing and ore-forming structures, these deposits show two main forms or subspecies of mineralization....

Linglong-Jiaojia-type gold deposits in this paper deff erent from main research types of the world mean the pyrite quartz vein-phyllic altered cataclasite type occurring in shear zone of granites of Mesozoic. The material base of alteration-remelting of the granites comes mainly from a Precambrian sedimentary-metamorphic series containing intermediate-basic volcanics. Because of different properties of ore-containing and ore-forming structures, these deposits show two main forms or subspecies of mineralization. The Linglong-subtype (quartz vein-type) and the Jiaojia-subtype (veinlet-disseminated phyllic altered rock-type) appear to possess a horizontal zoning mainly.In the research field of deformation in combination with petrofacies change of rock, this paper deals with the following, defines a reversed"S"-shape for the arcuate fault-fold metamorphic petrofacies form extending in the E-W direction in the Jiaodong basement and a "N"-shape for the fault-basin tectonic petrofacies form, and puts forward that the compounding of their both formed the basic tectonic frame of regional minerogenesis; the granitoid related to gold mineralization is respectively assigned to the com-presso-shear structural petrofacies Linglong-type granite, the compressive structural petrofacies Guojialing-type granite and the tensile structural petrofacies Luanjiahe-type granite, whose these characteristics are coordinated with Indosino-Yanshanian movement in this area; according to research of geology, chemical composition, isotope and REE etc., classifies the Precambrian metamorphic rocks chiefly of the Jiaodong Group as the intermediate source series whose original submarine intermediate-basic volcanics and elastics are initial ore source series, and the granitoid formed by metasomatism and remelting of them is the direct ore source rocks; minerogenesis is related to shear zone and its subordinate component, as a general rule, Linglong-Jiaojia-type belongs to gold-bearing shear zone-type gold deposit (M. emaison et al. 1986). Studying their genesis of above phenomena of relationship close between structure and petrofacies, author sets up the theoretical and mathematical model, measures the palaeostress, The palaeopressure and other physicoche-mical parameters, emphatically on basis of viewpoint of "the affect of tecto-nodynamics on hydrostatic pressure", and demonstrates that the tectonic additional hydrostatic pressure is basic dynamic factor causing the change of chemical progress and element properties in petrofacies change during deformation of rock. Forthermore, puts forward that the tectonic additional hydrostatic pressure is regarded not only as the physical variable causing the change of rock volume, but also as a physicochemical parameter affecting chemical progress in the deformational rock.

Stress state in the crust forms mainly Under the tectonic force and gravity. The author suggests that the hydrostatic pressure P of a point in the crust is a combination of two isotropic stresses in the stress field of both tectonic force and gravity. The former is referred to as a structural or tectonic additional hydrostatic pressure Ps and the latter as a gravity additional hydrostatic pressure PR·A formula of their relationship is listed below: where PRv is Poisson' s radio of rock, is density ofrock and...

Stress state in the crust forms mainly Under the tectonic force and gravity. The author suggests that the hydrostatic pressure P of a point in the crust is a combination of two isotropic stresses in the stress field of both tectonic force and gravity. The former is referred to as a structural or tectonic additional hydrostatic pressure Ps and the latter as a gravity additional hydrostatic pressure PR·A formula of their relationship is listed below: where PRv is Poisson' s radio of rock, is density ofrock and h is depth, or thickness of overlying rock.The calculations by the use of NOLM 83 (Wang Ken et al) in finite -element model of a horizontal plate under horizontal force indicate that the additional hydrostatic pressure by tectonic force gradually decreases in the given order in the compressive zone (Pcs),the shear zone (Pshs) and the tensile zone (Pts ) at the same depth.The horizontal force in the X direction is 10MPa, and that in the Y direction is 60 MPa. The σ1 and σ3 in elements are given in Table 2. The medium principal stresses can be calculated by plane strain problem, and each Ps in elements can be obtained (Fig- 3). The average values of P, in the different deformation zones are PC =30.3 MPa, Pshs = 27.24 MPa and Pts = 23.81 MPa.If the model horizontal plate is at a depth of 3.5km, and the force is 35 MPa in X direction and 85 MPa in Y direction, we get 3 principal stresses in elements.Because PR≈25 MPa in the reseach area,the average values of PS of each element group are Pcs = 25.02 MPa, Pshs = 23.31 MPa and Pts = 18.61 MPa after PR is reduced from average principal stresses (P). The difference between PC and Pshs becomes smaller, but the difference between them and Pts is bigger.This research explains an important theoretical problem about how the tectonic force effects the physicochemical environment of petrogenesis and metallogenesis, and is a theoretical basis of tectonic physicochemistry or te-ctonophy sicochemistry(Lu Guxian, 1991),which is a new branch or research field in geology.

This paper argues against the knowledge that hydrostatic pressure is equal to the gravity value of the overlying rocks in studying a dynamic state of certain underground site, and discusses the influence of tectonic stress on hydrostatic pressure and its application.The research of solid mechanics and data from deep drillings indicated that gravity and tectonic stress in middle and shallow crust are directional external forces, whereas hydrostatic pressure is a force of non-directionless, so they possess different...

This paper argues against the knowledge that hydrostatic pressure is equal to the gravity value of the overlying rocks in studying a dynamic state of certain underground site, and discusses the influence of tectonic stress on hydrostatic pressure and its application.The research of solid mechanics and data from deep drillings indicated that gravity and tectonic stress in middle and shallow crust are directional external forces, whereas hydrostatic pressure is a force of non-directionless, so they possess different physical meanings. Gravity is not quantitatively equal to hydrostatic pressure either. During 108a- 106a of stress relaxation, the directional force on solild rock of the crust produces a deviatoric stress field.The authors suggest that stress field T of the crust is a combination or superposition of hydrostatic pressure P with differential stress a, and the total hydrostatic pressure P at any point in the crust comprises two parts, one is spherical stress tensor PR caused by the gravity and the other is spherical stress tensor Ps caused by tectonic stress, therefore P is not only from the gravity of overlying rocks.The results obtained by a finite element simulation indicate that the additional hydrostatic pressures borne by rocks decrease gradually from the compressive zone (P) to the shear zone (P) and to the tensile zone (P), i. e; and the difference of the tectonic additional hydrostatic pressure between these deformed zones trends to Increase, following the increase in absolute value and/or difference of external forces in different directions. So the tectonic additional hydrostatic pressre is a major factor causing the heterogeneity of local stress field in the same depth of the crust.The above-mentioned research has a wide-range of application= 1) to set up a model of unequal hydrostatic pressures in same depth of the crust; 2) to establish the method of measurement of metallogenetic depth corrected by structure, i. e., firstly minute toctonic added hydrostatic pressure P. from general hydrostatic pressute P, then measure and calculate thedepth data of overlying rocks; 3 ) to get Into a new research field of tectonic physicochemlstry; 4) reconsider the depth of eclogite in superhigh pressure metamorphic zone, such as the knowledge that the diamond and coesite in Dabie tectonic-metamorphic zone are probably the products of the inner crust; and 5) to introduce some new ideas about experiments of chemical kinetics.